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From afe88750090d60d94b365250968e116ec88448c1 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 18 Jul 2018 17:25:00 +0100
Subject: [PATCH] overlays: Add gpio-no-bank0-irq overlay
See: https://github.com/raspberrypi/linux/issues/2590
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 9 +++++++++
.../dts/overlays/gpio-no-bank0-irq-overlay.dts | 14 ++++++++++++++
3 files changed, 24 insertions(+)
create mode 100755 arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -37,6 +37,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
gpio-ir.dtbo \
gpio-ir-tx.dtbo \
gpio-key.dtbo \
+ gpio-no-bank0-irq.dtbo \
gpio-no-irq.dtbo \
gpio-poweroff.dtbo \
gpio-shutdown.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -597,6 +597,15 @@ Params: gpio GPIO pin
keycode Set the key code for the button
+Name: gpio-no-bank0-irq
+Info: Use this overlay to disable GPIO interrupts for GPIOs in bank 0 (0-27),
+ which can be useful for UIO drivers.
+ N.B. Using this overlay will trigger a kernel WARN during booting, but
+ this can safely be ignored - the system should work as expected.
+Load: dtoverlay=gpio-no-bank0-irq
+Params: <None>
+
+
Name: gpio-no-irq
Info: Use this overlay to disable all GPIO interrupts, which can be useful
for user-space GPIO edge detection systems.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ // Configure the gpio pin controller
+ target = <&gpio>;
+ __overlay__ {
+ interrupts = <255 255>, <2 18>;
+ };
+ };
+};
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